How to solve problems with Wi-Fi in MacOS Mojave

Problems with Wi-Fi on your Mac after upgrading to MacOS Mojave 10.14? Most users have a version

MacOS Mojave works fine, but there are those who have problems connecting to the network.

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Most often, users cannot connect tonetworks, the connection is constantly terminated, etc. Below we describe how to solve similar problems in MacOS Mojave. Some tips will be extremely simple, and for some you will need certain skills.

Important: Before you do something, save backupcopy of your mac. This is necessary because you will have to interact with the system files. If you do something wrong, it can lead to undesirable consequences. Save a backup via Time Machine is very easy, so do not neglect it.

Install software updates and reboot Mac

Installing the latest available software versions is an excellent strategy, so the first thing you need to check is whether there are updates available for the system. If yes - they need to be installed.

You can check for availability and install updates in macOS through the Software Update section in System Preferences. Remember to save a backup of your computer before installing the update.

If no updates were available, restart the Mac anyway, because even this can help solve the problem.

Disconnect from Mac everything accessories

If Wi-Fi is working, but the connection is periodicallyinterrupted, or the Internet is too slow, try disconnecting from the computer accessories that are connected to USB 3 or USB-C ports. Some of them may interfere with the network.

Although it is strange, some accessories may interfere with Wi-Fi, especially on new MacBook and MacBook Pro models.

If after you unplug all the accessories,Wi-Fi will start to work normally, then it's in them. If the USB cable allows, you can move the accessory away from the computer to minimize interference.

Some users have solved the problem by changing the link from 2.4 GHz to 5 GHz. Some accessories may interfere with Bluetooth.

Change settings Wi-Fi

You can try to delete the current Wi-Fi settings and create new ones. For this:

  1. Back up your Mac if you haven’t yet done so.
  2. Open the Wi-Fi menu in the upper right corner of the screen and select "Turn off Wi-Fi."
  3. Now go to Finder and on your desktop or in documents create a folder with a name like “WiFi Backup Files”.
  4. In the "Go To" menu, select "Go To Folder."
  5. Navigate to the following folder:

/ Library / Preferences / SystemConfiguration /

6. Locate and select the following files in the folder:


7. Move these files to the folder you created “WiFi Backup Files”.

8. Now open the Apple menu and restart your Mac.

9. When the Mac starts up, open the Wi-Fi menu and select Enable Wi-Fi.

10. Connect to the network as usual.

Now you can open Safari and go toany site to check if the internet is working. In most cases, this method should solve all the problems. If the problem is not resolved, go to the next method.

Create a new access point

  1. Close all programs with Internet access (Safari, Mail, Messages, Chrome, Firefox, etc.).
  2. From the Apple menu, choose System Preferences.
  3. Select the Network section and then Wi-Fi in the menu on the left.
  4. Click the "Placement" menu, and then select "Edit Placement ...".

  1. Click the [+] icon to create a new access point and name it “FixWiFi”, and then click “Finish”.

  1. Select the Network Name menu, then select your Wi-Fi network and, if necessary, enter the password.
  2. Now click the "Advanced" button in the corner of the network settings window.
  3. Select the "TCP / IP" tab and click "Request DHCP Address".
  1. Now select the “DNS” tab and in the “DNS-servers” panel click [+] and enter the following IP addresses in different lines:

Note: These are the IP addresses of the Google DNS servers, but you can also use CloudFlare DNS or OpenDNS.

  1. Now select the “Hardware” tab and select “Manual” in the “Configuration” menu.
  2. In the "MTU" menu, select "Custom" and set the number to "1491".
  3. Click “OK” to save the changes.
  4. Click "Apply".
  5. Close the system settings.
  6. Check if the internet works.

Creating a new access point should solve most of the problems.

Reboot Wi-Fi router or modem

If you have problems with a particular router or modem, try restarting it. To do this, simply unplug the power cord for about 20 seconds, and then plug it back in.

The process of rebooting routers and modems may vary depending on their manufacturer. If you do not know what to do, try searching for instructions online.

Additional tips

  • Try reinstalling MacOS Mojave.
  • Reset the SMC data.
  • Reset NVRAM / PRAM.
  • If all else fails, roll back from MacOS Mojave to the previous version of the system.

Almost every MacOS update leads toproblems with Wi-Fi for a small number of users. In most cases, changing the settings or something else may solve the problem. Most users should not have any problems in MacOS Mojave 10.14, but this is not for everyone. Fortunately, solutions are not so difficult.